/Engine/Plugins/Runtime/MassGameplay/Source/MassRepresentation/Public/MassRepresentationSubsystem.h
Store the template actor uniquely and return an index to it
The index of the template actor type
int16 FindOrAddTemplateActor ( const [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [AActor](API\Runtime\Engine\GameFramework\AActor) > & ActorClass )